Drilling apparatus



G. G. REEVES.

DRILLING APPARATUS.

APPLICATION FILED APR. H. 1921.

1,395,059. Patented Oct. 25, 1921.

4 Ii lv IN VEN TOR.

A TTORNEYS GEORGE G. REEVES, OF HUMBLE, TEXAS.

DRILLING APPARATUS.

Specification of Letters Patent.

Patented Oct. 25, 1921.

Application filed April 11, 1921. Serial No. 460,477.

To all whom it may concern:

-Be it known that I, GEORGE Gr. REEvEs, a citizen of the United States,residing at Humble, in the county of Harris and State of Texas, haveinvented certain new and useful Improvements in a Drilling Apparatus, ofwhich the following is a specification.

This invention relates to new and useful improvements in a well drillingapparatus and has particular relation to an improved form of break-outpin employed in screwing together or unscrewing joints of pipe.

One object of the invention is to provide an apparatus of the characterdescribed which has been specially designed for application to a rotaryand is used in connection with a pipe tong for screwing together orunscrewing the joints of pipe used in drilling.

Another object is to provide a break-out pin which may be readilyreleased from the pipe tong.

A still further feature resides in the provision of a break-out pinwhich is of simple and durable construction and may be cheaplymanufactured and readily applied to the work.

With the above and other objects in view the invention has particularrelation to certain novel features of construction, opera tion andarrangement of parts, an example of which is given in this specificationand illustrated in the accompanyng drawings, wherein Figure l is afragmentary vertical sectional view of a rotary, showing the breakoutpin applied to the work.

Fig. 2 is a transverse sectional view of the break-out pin taken on theline 22 of Fig. 1.

Fig. 3 is a lower end view of the section of the pin.

Fig. 1 is a side view thereof.

Fig. 5 is a lower end view of the anchor post employed, and

Fig. 6 is a side view thereof.

Referring now more particularly to the drawings, the numeral 1designates the rotary base plate, the niuneral 2 designates the rotarytable which is mounted on said base plate and the numeral 3 designatesthe driving pinion of the table. The numerals 4 and 5 designate upperand lower sections, respectively, of the drill stem, said sections beingconnected by a collar 6. In applicaupper tion, when it is desired toscrew together or unscrew the pipe sections the lower section is held inthe rotary table against rotation by means of pipe-engaging slips 7 ofwell known construction and use. The rotary table has a deep socket 8provided to receive the lower end of the anchor post 9, said anchor postforming the lower section of the break-out pin. The section of theanchor post above the table is formed square in cross section and hasthe lateral projections 10, 10. The upper end of said post has a slightbevel, as at 11. The upper section 12 of the break-out pin is taperedfrom the lower to the upper end thereof and in cross section iselliptical in form, as shown in Fig 2, and is provided with the gripring 13. The lower end of the section 12 is provided with a socket 14which receives the upper end of the anchor post 9, the upper end of saidsocket being beveled to conform to the beveled upper end of said anchorpost. When the section 12 is seated on the anchor post the dependingprojections 15, 15 thereof engage behind the lugs 10. The beveled end ofthe anchor post 9 contacts against the beveled inner end of the socket14: and the projections 15 interlocking with the lugs 10 hold thesection 12 of the break-out pin against falling over when not in contactwiththe pipe tong. The numeral 16 designates a pipe tong of the usualconstruction, which is engaged around the upper section 4 of the pipe.The rotary is then turned in the usual way and the breakout pin will becarried around against the tong and as the rotary continues to turn thepipe section 4 will be turned with it and screwed to or unscrewed fromthe section 5. When it is desired to release the break-out pin from thetong the upper section 12 is pulled outwardly through theinstrumentality of the grip ring 13 and disengaged from the handle ofthe tong. On account of its upward taper, a very slight outward pullwill re lease the pipe from the tong. It is now common practice to use arod or bar whose lower end is inserted in the socket 8 and whose upperend engages with the tong, but this rod is very difficult to releasefrom the tong and when used a hammer or other implement is required todisengage the bar from the tong in order to withdraw said bar from thesocket. The type of break-out pin herein described and shown has beendesigned so that when the pipe section is screwed together it may bereadily released from the tong and then removed from the table so as tobe out of the way.

What I claim is 1.. A break-out pin formed of two sections,'one of whichtapers from its lower to its upper end and whose lower end isforinedwith a socket, and the other of which has its upper end formed to fitinto said socket.

2. A break-out pin formed of two sections, one of which tapers from itslower to its upper end and whose lower end is provided with a lateralsocket and spaced projections, and the other of which has its upper endformed to fit into said socket, and lugs carried by the last mentionedsection with which said projections engage.

A break-out pin including an anchor post whose upper end is beveled, andan upwardly tapering section whose lower end is provided with a lateralsocket into which the upper end of said post snugly fits.

4. A break out pin including an anchor post whose upper end is beveled,and an upwardly tapering section whose lower end is provided with alateral socket into which the upper end of saidpost snugly fits, laterallugs carried by said postand spaced projections carried by said sectionand interlock ing with the lugs.

In testimony whereof I have signed my name to this specification inthepresence of two subscribing witnesses.

' GEORGE G. REEVES.

Vitnesses JNo. l3. OLIVER, E. V. HARDWAY.

